Rock layer
A thin sheet of rock formed from the same material
Geologist
A scientist who studies the processes and materials that form the solid part of Earth
Sediment
Small pieces of rock, such as silt or sand
Data
Observation or measurements recorded in an investigation
Stable
Staying mostly the same
Sedimentary rock
A type of rock formed from sediment that compacts and cements over time
Inference
Something you figure out based on observations and what you already know
Pattern
Something we observe to be similar over and over again
Environment
All the living and nonliving things in an area
Evidence
Information that supports an answer to a question
Cement
To stick together in the process of forming rock
Observation
Something you notice using any of the 5 senses
Model
Something scientists make to answer questions about the real world
Erosion
When rock, soil, or sand is worn down and moved from one place to another by water, wind, or ice
Compact
To press together
Fossil
A clue about life from the past that is preserved in rock